If the entire history of the earth is symbolized by a 12-month calendar, dinosaurs and mammals both
appeared in the month of
a. August
b. September
c. October
d. November
e. December
E
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The type of RNA that carries protein-building information is called _____
a. ribosomal RNA b. transfer RNA c. messenger RNA d. reader RNA e. translator RNA
In a polypeptide, when peptide bonds are formed between adjacent amino acids:
A) a water molecule is gained by the carboxyl group B) the amino groups of two adjacent amino acids are attracted by hydrogen bonds C) the carboxyl group of one amino acid joins with the amino group of the adjacent amino acid and water is lost D) the protein folds into a complex shape E) the carboxyl groups of two adjacent amino acids are joined by a covalent bond
Which of the following is NOT an endocrine gland?
A. pituitary B. testes C. thymus D. hypothalamus E. All are endocrine glands.
Which one of the following is TRUE regarding deoxyhemoglobin?
A) Deoxyhemoglobin delivers oxygen to tissues that have a high oxygen demand.
B) Deoxyhemoglobin has a bright red color.
C) Deoxyhemoglobin is found in blood returning to the heart from the lower extremities.
D) Deoxyhemoglobin would form in organs with a high concentration of oxygen, such as the lungs.
E) Deoxyhemoglobin is located in white blood cells, unlike oxyhemoglobin.